# RTA Audio vs Blastking App

The clearest difference is in-app purchases: Blastking App at none against RTA Audio's 1. Blastking App also leads on update cadence (every 3 days vs every 28 months) and iOS requirement (13.0 vs 15.6). On price, ads and device support there is nothing between them.

Both are free to download. RTA Audio sells 1 one-off in-app purchase. Blastking App asks for nothing beyond the download.

RTA Audio ships an update every 28 months, Blastking App every 3 days. The most recent releases landed on October 23, 2026 and October 6, 2026 respectively.

## The numbers

| Metric | RTA Audio | Blastking App |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.5 (32 ratings)](https://appshunter.io/ios/app/rta-audio/id525324684/reviews)** | — |
| Number of ratings | **32** | — |
| Positive reviews | 58.5% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 28 months | **Every 3 days** |
| Monetization | Free with in-app purchases | — |
| Size | 2 MB | 53 MB |
| Requires iOS | 15.6 | **13.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [New Ball s.r.o.](https://appshunter.io/developer/1178970340) | [Intermark Industries Inc.](https://appshunter.io/developer/1649830981) |

## What reviewers say

### RTA Audio

[App page](https://appshunter.io/ios/app/rta-audio/id525324684)

Analyze audio in real-time with detailed frequency spectrum and waveform visualizations. Record and export your audio analysis results, including spectrograms and frequency tables, for sharing or archiving.

**Highlights:** Real-time audio analysis (FFT), Recording and offline processing, Spectrogram and waveform visualization, Exportable analysis reports (PDF), Adjustable resolution and frequency scale, Peak and RMS metering

**Features:** Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Upgrade to full version | $14.99 | one-time |


### Blastking App

[App page](https://appshunter.io/ios/app/blastking-app/id6443836109)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is RTA Audio free?

RTA Audio is free to download, with in-app purchases available.

### Is Blastking App free?

Blastking App is free to download, with no in-app purchases.

### Do RTA Audio or Blastking App have ads?

Neither RTA Audio nor Blastking App shows ads.

### Which is updated more often, RTA Audio or Blastking App?

RTA Audio ships an update every 28 months, and Blastking App every 3 days. Most recently, RTA Audio was updated on October 23, 2026 and Blastking App on October 6, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*